Using File.createTempFile as the first step in creating a temporary directory causes a race condition and is inherently unreliable and
insecure. Instead, Files.createTempDirectory (Java 7+) should be used.
This rule raises an issue when the following steps are taken in immediate sequence:
- call to
File.createTempFile
- delete resulting file
- call
mkdir on the File object
Note that this rule is automatically disabled when the project’s sonar.java.source is lower than 7.
Noncompliant Code Example
File tempDir;
tempDir = File.createTempFile("", ".");
tempDir.delete();
tempDir.mkdir(); // Noncompliant
Compliant Solution
Path tempPath = Files.createTempDirectory("");
File tempDir = tempPath.toFile();
See
